4* 4 keyboard test procedure, only 61 or 51 Singlechip P0, P1, P2 can be any of the mouth, where there is no line inversion method used to achieve reading keys, compare Tebian Oh

newkeyboard
...........\head.h
...........\main.c
...........\main.LST
...........\main.OBJ
...........\newkeyboard
...........\newkeyboard.hex
...........\newkeyboard.lnp
...........\newkeyboard.M51
...........\newkeyboard.plg
...........\newkeyboard.uv2
...........\STARTUP.A51
...........\STARTUP.LST
...........\STARTUP.OBJ

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